11221221022123 has 4 divisors (see below), whose sum is σ = 12824252596720. Its totient is φ = 9618189447528.

The previous prime is 11221221022021. The next prime is 11221221022129. The reversal of 11221221022123 is 32122012212211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11221221022123 - 2⁹ = 11221221021611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221221022094 and 11221221022103.

It is not an unprimeable number, because it can be changed into a prime (11221221022129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801515787288 + ... + 801515787301.

It is an arithmetic number, because the mean of its divisors is an integer number (3206063149180).

Almost surely, 2^{11221221022123} is an apocalyptic number.

11221221022123 is a deficient number, since it is larger than the sum of its proper divisors (1603031574597).

11221221022123 is an equidigital number, since it uses as much as digits as its factorization.

11221221022123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603031574596.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 11221221022123 its reverse (32122012212211), we get a palindrome (43343233234334).

The spelling of 11221221022123 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-three".